# Homework Help: HELP i cant think of the formula!

1. Sep 20, 2011

### BeccaWella

HELP!!! i cant think of the formula!

1. The problem statement, all variables and given/known data

A 0,05kg golf ball is driven from the tee at a speed of 80m/s. if the average accelerating force on the ball is 6500N, determine how long the clubhead is in contact with the ball.

2. Relevant equations

3. The attempt at a solution

I have sat staring at this question for awhile. could somebody please help me out so i can substitute...?

2. Sep 20, 2011

### danielakkerma

Re: HELP!!! i cant think of the formula!

Have you heard of the law of Impulses?
It states that: $$\Delta{\vec{p}} = \overline{\vec{F}}\Delta{t}$$
Try it.
Where dP is the change in momentum, and F is the average force...
Daniel

3. Sep 20, 2011

### BeccaWella

Re: HELP!!! i cant think of the formula!

Thank you

What would Δp⃗ be?

Last edited: Sep 20, 2011